Didn't have time earlier to look at this...but did today and am glad for it.
Since I've just "found" the Blur/Edges Only technique for creating some interesting line drawings, I can (like Scott mentioned) take those steps further with more work on the line drawing side of things.
Nice way to step through the action and see whats happening.
I look forward to more tutorials here, although finding the time is going to be the REAL key, so much for sleeping!
Thanks Danny